er is non-null

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: hint::assert_unchecked must never be called when the condition is false

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: hint::unreachable_unchecked must never be reached

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.unsafe precondition(s) violated: Layout::from_size_align_unchecked requires that align is a power of 2 and the rounded-up allocation size does not exceed isize::MAX

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.description() is deprecated; use Displayunsafe precondition(s) violated: slice::from_raw_parts requires the pointer to be aligned and non-null, and the total size of the slice not to exceed `isize::MAX`

This indicates a bug in the program. This Undefined Behavior check is optional, and cannot be relied on for safety.GlobalPoolAlreadyInitializedCurrentThreadAlreadyInPoolIOErrorThreadPoolBuildErrorThe global thread pool has already been initialized.The current thread is already part of another thread pool.ThreadPoolBuildernum_threadsuse_current_threadget_thread_namepanic_handlerstack_sizestart_handlerexit_handlerbreadth_first4